Corner-cutting machine for box blanks



i s. s. GIPE. CORNER CUTTING MACHINE FOR BOX BLANKS.

APPLICATION FILEYD APR. 5, 192|. l

Patented May 16, 1922.

m kwmw 'Sl Sl C ORNER CUTTING MACHINE FOR BOX BLANKS.

APPLICATION FILED APR. 5, 1921. 1,416,282. Patented VMay 16, 1922.

l s. s. GIPE. CORNER CUTTING MACHINE FOR BOX BLANKS.

APPLICATION FILED Ams, 192x.

' Patented May 16, 1922,

Il SHEETS-SHEET 3.

S. S. GIPE.

l CORNER CUTTING MACHINE FOR BOX BLANKS. l

A`PPLICAT|0N FILED APR. 5,1921. 1,416,282, Patented May16,1922.

' 11 SHEETS-SMU 4.

S. S. GIPE. 'CORNER CUTTING MACHINE FoR'ox BLANKs.

APPLICATION FILED APR.5, 192i.

Patented May 16, 1922@ l I SHEETS-SHEET 5.

e, Y Il.

S. S. GIPE.

CORNER CUTTING MACHINE FOR BOX BLANKS.

1922., n sHEETs-sflm a.

MFUCTION FILED APR. 5,'1921. 1,416,282. Patented. May 16,

s. S. GIPE.

CORNER CUTTING MACHINE FOR BOX BLANKS.

APPLICATION FILED APR. 5. 192|.

y Patented May 16, 192,2.

Il SHEETS-SHEET Z.

s. s. GIPE.

C'ORNERCUTTING MACHINE FOR BOX BLANKS.

APPLICATION FILED APR-5, |92!- y 1,416,282, Patented May 16, 1922.l

- Il SHEETS-SHEET 8.

s. s. GIPE.

CORNER CUTTING MACHINE .FOR'BOX BLANKS.

v APPLICATION FILE-D APR. 5, 1921. 1,416,282. Patented May 16, 1922.

, i l Il SHEETSJ-SHEET 9.

W N a N. M fw N N N q .Y lg o y@ A Humm WEINHEIM 13W' l 23mg S. S. GIPE.

coRNER cumm; MAcHme ro Box LANKs.

APPLICATION FILED APR. 5,1921. 1 ,416,282. Patented May 16, 1922.

Il SHEETS-SHEET l0.

l i I i l l I l l i 5 I 5 5 l l S. S. GIPE.

CORNER CUTTING MACHINE FOR BOX BLANKS.

APPLICATION FILED APR-5', I92I.

1,416,232, Patented May 16,1922.

l II SHEETS-SHEET II.

' l l f2 iig/.14.

/"/2.9 I @2v /a a o .s ri es.

SOLOMON S. GIPEL, F HERSHEY, PENNSYLVANIA.

CORNER-CUTTING- MACI'IINE FOR BOX BLANES. i'

Application filed April 5, 1921. Serial No. 458,819. p l. l

To all fui/lem t may concern Be it known that l, SOLOMON S. Gire, acitizen of the United States, residing at Hershey, in the county ofDauphin and State of Pennsylvania, have invented certain new and usefulImprovements in Corner-Cutting ll/lachines for Box Blanks, of which thefollowing is a specification. I.

@ne object of my invention is to provide an improved machine which willsimultaneously cut a plurality of corners from blanks of sheet naterial,such for example as from rardboard, in order that the blanks may be'formed into boxes. l

Another object is to so construct my improved machine that it will becapable of cutting blanks of different sizes.

1 Another object is to so make my improved machine that it will becapable of cutting out cerners of different widths and depths.

il. still further object is to so arrange the parts of my improvedmachine that a quick and accurate adjustment may be made for cutting thematerial as above set forth.

Another object of my invention is to provide means which will be soarranged'and Operative that there will be no possibility of the sheetmaterial getting out of proper aliamnent either during the feed orcutting operation.

le. further object is to provide improved funding means which insuresproper feed il discharge ofthe material.

a. still further object is to provide` anautoinmic control vwherebylarge quantities of materialmay be arranged in stack form;

thc sheets of material being automatically I d delivered in such mannerthat it Y deposited in superimposed condition f it can be easily andquicky removed, when cut. :in bundle or stack form.

These 'object/s, and other advantageous ends which will be describedhereinafter, l "in in the following` manner, reference had to the accinpanying drawings in' which L.

Figure 1 is a side elevation of my ime`-1nachiiie,r

fe 2 is a top plan view of the machine Figure 5 is-an enlargedfragmentarylongitudinal sectional elevation taken on .the line 5 5 ofFigure 2,

F igure is an enlarged fragmentary longitudinal section taken on theline 6-6 of Figure 2, l l

Figure 7 is a transverse sectionalelevation taken on the line 7d? ofFigure 6, illustrating the same with one of the bottom.

cross beams of the main frame omitted,

Figure 8 isa fragmentary sectional plan view taken on the line`8-8 of.Figure 7',

Figure 9 is a fragmentarysectional plan view taken onl the line99 ofFigure 7,

Figure l() is a fragmentary perspective view showing one of the cuttingunits together with means `for insuring the proper placement of thematerial tobe cutupon the movement ofsaid material into the machine,

Figure 11 is a side elevation illustrating.

certain of the parts moved into a different position from thatillustrated in Figure 10 and showing the action of the several partsupon the approach of the materialto the cutting unit and to theautomatically mov- I able stop, 1 Figure 12 is a fragmentary viewillustrating means for locking the stop in;position and showing thearrangement of the-locking Figure 16 is a face view ofa boX lolanlnllia-vino` corners cut therefrom bl Lm yimn n u proved machine in orderto form a boX.

Referring to the drawings, 20 represents a main supporting framewhich'is prefer'- ably made of an open construction yso `as to permitaccess indiiierent directions to the various supported elements forpurposes obivious from. the construction hereinaftergdescribed. Theframe 2O has two'upper transverse beams 21 and two lower transversebeams 22. A. common superimposed Glitter supporting head 23 includes an`upper frame 241- which is preferably made substantially rectangular inform as shown in Figure.` 2;

said frame adjacent yits four corners having suspended'from the. bars 30by bolts 33 which pass through the transverse slots 31 in the bars 30."These cutters 32v are adapted to slide vertically'within cuttei-"casings34; said casings "at their botto-ms being slidably mounted inlongitudinal directions on bed 'bars 35'; there beingin the presentyinstance two of'said bed 'bars having portions spaced apart' directlyunder the cutter casings to provide v'a/space' 36 tol permit thecuttings tofall therethrough-as will hereinafter be described.

The bed ba'r's 35 are supported on the. lo-wer beams( 22"`of the mainframe; said lower 'beamshav'ing undercut grooves 37, as clearly shown inFigure 4, in which the lower'headvede-rlds 38 of bolts39 extend; saidbolts 39 'being 'secured `to the end portions 40 of the bed. bars 35 sothat said; bedbars have transverse adjustmentl The cutter casings 34 areslightly'undercut at their bottoms so as to provide' shoulders forabutment with the spaced portions of the respective bed. bars 35, andadjusting screws "41, which have right left handed screw threadedportions,4 lareI adapted to engage screw threaded' brackets 42 which aresecured to the sides of the cutter'ca-sings 34 as clearly shown inFigure 6.' The cutter casings are also provided with extensions 43through which bolts `44-pass; said bolts 44 'extendingl int-o grooves.45 'inthejbe'd' bars 35. The adjusting screws 41 are pro-vided withworm wheels`46 which are in mesh with worms 47 on' a v`shaft 48; saidshaft extending transversely lthrough the machine: and provided withhand wheels 49v on opposite sides of the frame whereby it can belmanually rotated to adjust'the longitudinal positions of the casings andcutters when'the bolts 29 and 44 are loosened; it beingy noted that theshaft 48 is provided with 'a key-way 50 extending in 'the direction ofits length in which. keys 51 in lthe worms 47 slidablyy fit. In order toprovide transverse movement ofthe 'cutters' and cutter casings lprovide'thel bed bars 35 with screw threaded bearings 52 in whichtransversely :extending screw vthreaded shafts 53extend;

said screw' threaded shafts having sprockets 54 secured thereon overwhich passes a chain 55 so as to y'couple'said shafts together. By thusoperatively coupling the shafts'53 to- V59. These 'and these centralsupporting rails gether they may be simultaneously operated frame 20;said shafts 53 being journaled in bearings 57 in the main frame 20. Thecutter supporting head, which includes the. frame 24 and transverse bars30,v receives a vertical reciprocating movement during the operation ofthe machine through the medium of the following structure.

Connecting rods 58 are pivotally connected at the sides of the frame 24as shown at connecting rods 58 depend through the frame 20 and at theirlower ends are provided with eccentrics 60 on a shaft 61; said shafthaving a clutch collar `62 slidably keyed thereon and adapted to bemoved into engagement with the clutch face 63 on 'a gear wheel 64; saidgear wheel being lin mesh 'with a pinion 65 rfixed on the maindriveshaft 66; said main drive shaft being Adriven from any suitablesource of power through the medium of a. pulley 67 as clearly shown inFigure 9. lt will thus be noted kby a. hand lever 56 ateither side ofthe main .i

that during the rotation of the shaft underI certain conditions: duringthe operation of, the machine,` the eccentrics will operate to move thecutter supporting frame 23 upwardly and downwardly to cause areciprocation of the cutters 32 withinv the casings 34.

The opposed portions of the cutter casings aire cut away adjacent theirbottoms to provide mouths 68; the portions 69 of said cutter casingsbelow said mouths .being proi vided with cutting blades 70 adapted toco` act with the cutting blades71 of the cutters 32 to cut the cornersof sheet vmaterial such as cardboard blanks 7 2, as illustrated in dot-Vand-dash line, when said blanks are positioned under` the cutters bymechanism hereinafter described.

Supporting rails 73 which are secured on the bed bars 35, as clearlyshown in Figure 7 are positioned so that their upper surfaces are flushwith the upper surfaces of the bottom portions y69 of the cutter casingsas clearly shown in Figures 7 and 1Q; the portions 69 of said cuttercasing being preferably curved as shown at 74 to permit said side rails73 to extend therein so that an accurate sliding relation is renderedpossible when it is necessary to'adjust the cutters and cutter casingslongitudinally. I also preferably provide central supporting vrails 75as clearly shown in Figure 7 for supporting the central portions of thematerial to be cut are mounted on legs or brackets 76 which in turn aresecured on the lower beams 22 of the main frame 20. The opposite ends ofthe central rails 75 are provided with adjustable extensions 77 and theside supporting rails 73 are also provided with adjustable extensions 78at their opposite ends as clearly shown in Figure A6.

My improved machine as illustrated is corners of a number or group ofsuperim` posed blank sheets and I have provided means for automaticallyfeeding the sheet material under 'the cutters and l willA now describesaid latter mentioned means. A bar 79 is slidable transversely upon aneX- tensioii 80 of the base of the frame 20 as clearly shown in Figuresl and 2 and this bar 7 9 has stanchion posts 81 which are se; cured attheir upper ends to an auxiliary frame 82; said auxiliary frame beingslidably mounted on the lower front beam 22 of the frame 20. Thus thestanchion posts 81, bai 'T9 and auxiliary frame 82 may be slidably movedtransversely of the frame 20 by merely pushing laterally upon the saine.

Two tables 83 and 84C are slidable verti-` cally on the posts 81 asclearly shown in Figures 1 and 3; there being four posts 81 asillustrated and arranged in pairs uponl which the tables respectivelyslide. rllhese tables are adapted to receive the' sheet material insteekform as indicated at 85 inl Figure 1- and these tables as they are movedinto alignment with the central portion of the-frame, s-uch for exampleas in the posi tion occupied by the table 83 in Figure 37 are adapted tobe automatically moved upwardly by a step by step movement so as topresent the uppermostsheets on a level with the tops of the supportingrails 7 3 and 75.

Since the mechanism for intermittently moving the tables 83 and 84Cupwardly isA identical, I will describe but one of the mechanismsindetail and it willr be understood that the mechanism for raising theother table is substantially the same'.

A shaft 86 has sprockets 87 secured thereto over which pass chains 88.These chains are connected at 89 to the bottom portion 90 of the tableon opposite sides thereof.

Levers 91 have pawls 92 thereon as shown in Figure 3, and these pawlsare adapted to en gage the teeth of `ratchet wheels 93 on the shaft 86.The levers'91 have slots 9a therein through which bolts 95 in links 96extend; said bolts beingadapted to be secured in any position within thelength of the slots. The links 96 are connected with arms 97 which arepivotally connected to the slidable auxiliary frame 82 as shown inFigure land ther 106 which is pivoted at v107 on the frame 20.

rlfhe opposite end of the lever 106 is adapted to be raised by means ofa pin 108 on a wheel 109 which is secured' to aurotatable shaft 110.

vThis shaft 110 has a gear wheel 111 fixed thereon vwhich' meshes with a-pinion 112 t which is'rotatably secured to the gear wheel 6d. rlihus itis obvious that when the shaft 110 is rotated, the' lever 106 willbeiiitermittently swung and by the above described connection thevconnecting ,bars 100 will swing thearm 97 so as to pull the link 96 andtoy cause the sprocket wheels 8,7 to be intermittently rotated so as tolift the table 83 in a step by step movement.'l A spring 113 detent pawl93a is'positioned for engagement' -witli the ratchet v93 to Vprevent thetable 83 'from accidentally movingv downward after each upward movement.y

' lt is apparent thatby moving the bolts 95 into various portions of theslots 94 thatv the amount of movement imparted to the ratchet wheels'canbe varied so asto effect `rgreater or less intermittent liftingmovements ofl the table.- I'also preferablyprovide a stop for the returnmovement of the arms 9T and in the present instance' have illustratedsaid stop as consisting of a screw 114 mounted in ya progection115whicli extends from theside of the auxiliary frame 82.

A feed carriage 116 isslidably mounted on a rail 117 g said rail 117being angular iiil crosssection'to prevent swinging movement ria-ge hasa depending feedinghnger 118 which presents a shoulder-119 to theforward face ofthe bundle or stack of sheets while resting on the table83 and during the movement y ofk the vcarriage y,inwardly bylniechanismv hereinafter described, vthe shoulder "119 4of the finger118 will move anumber `of theA sheets into the machine so that thesheets will slidably rest on the-supporting rails .73 and 75. Thecarriage 1716 has ya spring pressed latch`120 pivotally mounted thereonata spaced distance from the finger '118 and this latch, as clearlyshown in Figure 5,

.serves to push the sheets, which have been previously cut, out of themachine; said cut sheets being slidableon the rails 7.3 andr 75-of-tlie'feedcarriage thereon. Thelfeed carand out upon receiving meanswhich willv u v *AED u hereinafter be described; it being noted thatthesheets as they are fed into the machine will pass into the mouths orcutaway poi'- tions 68 of the cuttercasings up in a position directlyunder the cutters as the latter descend due to the connecting meansabove described. 'lihe means which moves the cany i-iage for the feedingoperation will now be described.

A conveyor casing '121, shown in Figures 5 and 13, is secured to theupper beams 21 of the frame 20 in a position which is clearly,r

directly above the carriage rail. 117. This casing encloses conveyorbelt or chain 122 `which passes around two sprocket wheels has holestherein through which the guide rods 129 extend so that the connectinghead '132 is slidable backwardly and forwardly along the guide rods 129as clearly shown in Figure 5. The connecting head 1-32 also has holesthrough which' the opposite runs of the conveyor chain are adapted topass. The lower end of the connectingehead is connected by a pivoted rod133 ;'said rod eX- tending through a collar 134 which is pivoted at 135to a lug 136 on the carriage 116. A tapered gland nut 137 surrounds therod 133 and fits within a tapped recess in the collar 134 so that whenthe gland-nut is tightened, it will clamp upon the rod 133 and therebysecurel the rod to the `collai` 134.

s By thus vpivoting the collar 134 on the lug 136 thereis a compensationfor any variation in the alignment of the several parts and a free andsmooth actuating movement results. .The connecting head 132 has oppositeside portions which are spaced apart toprovide an vupright chamber orlguide way 133 in which is slidable a carrier bolt 139;

said carrier' bolt beine` oit such length as clearly shown in Figure 13`that when moved upwardly its top will be in the path of movement of aprojection 140 on the conveyor chain 122 and thebottom of the carrierbolt 139 will be above the level of the lower run of the chain 122 sothat the upper run'of Vthe chain will move the connecting head 132 inthe direction ,of the upper arrow als shown 1n Figure 5. It, on theother hand, the

-carrier bolt 139 is moved downwardly, the

projection 140 when traveling ron the lower run of the chain will engagethe lower portion ot the carrier bolt and move the connecting` head ,inan opposite direction.r rllhus it is seen that it the carrier bolt 139is alternately moved upwardly and downwardly that the connecting headwill receive a reciprocating movement which it will impart tothecarriage 116. i accomplish this raising and lowering movement oit thecarrier bolt 139 by inserting a shitt bolt 141 within the connectinghead; said shift bolt vhaving an inclined slot 142 through which'a pin143 in the carrier bolt 139 projects. The

shift bolt 141 is of greater length than the width ot the connectinghead 132 and the arrangement is such that when the connecting head ismoving in one direction7 such for example as the directionvoit the upperarrow in `Figure 57 one end of the shift bolt will strike the stop 131at the end of the guide rods 129 and a slight continued movement of theconnecting head in said direction will cause the carrier bolt 139 to belowered due to the pin and slot connection above specimoved out of thepath ot the projection 140 on the upper run4 of the chain 122 and thelconnecting head will remain stationary until said projection passes tothe lower-run` where it will engage the lower portion of the carrierbolt and move the connecting head in an opposite direction and therebycause the shift bolt to engage thefstop 130 to cause the carrier bolt tobe again raised and in this manner the reciprocating movement ot theconnecting head and carriage kis accomplished. n 'l ln order to preventthe `inertia of the. sheets of material while being moved vinto themachine, from carrying the sheets beyond the proper position below theCutters, l provide the following mechanism as clearly shown in Figures5, 10, 11 and 12. Adjacent the rear cutter casings l mount plates 144;said kplates being positioned in undercut grooves 145 in the bottomYportions of the cutter casings 134 and these plates 144 are adjustablyconnected longitudinally tothe cutter casings by means of set screws146.v

, lied and the top ot the carrier bolt will be tion with their top edgesflush with the tops i of the rails 73. Strip springs 150 are connectedto the plates 144 and normally serve to move the limiting stops 157upwardly into a position so as to form an abutment vfor the ends ot thesheets as clearly shown in Figure 11. The stops 147 have notches 151therein into which locking bolts 152 are adapted to move when the stopsare in their lowermost or normal positions such Jfor eX- ample as shownin Figures 10 and 12. These locking bolts are moved into said lockingpositions by springs l153. Trip levers 154 are pivotally connected at155 to the plates 144 and said trip levers have independently pivotedends 156 which swing in one direction relatively to the body portions ofthe trip levers. These ends 156 are adapted to engage back shoulders 157on the locking bolts 152 when the trip leversv are in their upright orvertical positions, such yas shown in Figure 10.v `When in the uprightpositions, the tops of the trip levers 154 are in locking bolts yfromthe notches 151.

the path of movement of the sheets `and when the ends of the sheetsstrike the upper parts of the trip levers7 the trip `levers will beswung on their pivots 155 against the action of springs 158 and the ends156 will slide `thereby hold thelimiting stops 147 down in their normalposition during the ejection of the cut sheets. After the sheets havemoved,

from over the top of the trip levers 154, the

springs 158 will move said trip levers from' their upright positions andthe ends 156 will swing on their pivots so as to permit said ends toagain position themselves in back of the -shoulders'157 on the lockbolts 152. The arms 159 onthe shoulders may.

be adjusted in the event of the requirement of adjustment of thelimiting stops 147 by movement ofthe plates 144 by sliding the arms intheundercut grooves 160 as is clearly j obvious in the `showing ofFigure `101; there: being a set screw 161 to secure the arm in.

its adjusted position.` l

lI preferably mount rollers 162 in a bracket 163 for-the purpose ofengagement with the uppermost sheets as a number of the sheets arepushed into the machine by thecarriage linger 118 and this bracket 162is supported on a cross bar 164 on an extension 165 of the main frame20; said construction being clearly illustrated in Figures 1 and 8. l

In order to prevent lateral shifting movement of 'any ofthe sheets whilethey are passing into the machine, I provide flexible strips or bands166 which are, arranged parj allel tol each other and in pairs; one pairbeing arranged vbetween the cutter casings.

while the other pair is positioned forward of the cutter ,casings asclearly shown in` Figurel 5. Each band of the centra-l pair has itslforward end secured to a slide. 167 which is adjustably mounted inundercut grooves in side portions of the cutter casings as clearly shownin'perspective view in Figure l10; the slides being secured by means .ofset screws 168-l so that the bands can` be moved apart or `togetheraccording to the width of the sheets passing into the machine and .anysmall adjustment desired -can be made without varying the adjustment ofthe cutting elements.` J

The rear ends of the strips 166 are wound upon reels 169 such as shownin detail in` Figureil yand these reels are `preferably provided withspiral springs 170 which aref mounted in casings 171"V adj acent`theirfends;

stripson the reels so, that if the cutting .said springs normallytending-to wind the units are moved toward each other .inra direction`longitudinally of the ksprings that the springs 170 will turn the reelsto take up a part of the stripsl equal to thedistance which the cuttingunitshave been` moved.` j l/ Vhen the cutting units are moved apart:

longitudinally of the machine, the reels will be rotatedv to` provide anadditional.length/i o1p thestrip .therebetween and the,y spring 170 willbe subsequently tightened fand placed under greater tension. In order toprevent any-lateral shifting movement.v of the` sheets as they passbetween the jstrips fromv bowing the stripsI to the ententvyof turningthe rcels,'l providejclamping bolts 172 inthe reels; said `clampingbolts having thumb nuts 17 which when-tightened willy serve to jam theparts together yto prevent the rotation, ofthe reels. The forward pairto the central pair just described lwiththe exception that the reels.forthe forward pair of strips arekmounted in standards 174.

`of strips 166 are'made substantially similar The standards 174 areslidably mounted in u undercut grooves 175 which `entend transverselyofthe beds 85 as ,shown in Figure 4 y said standards j being securedv in;any, desired transverse position by means `of set screws Y 17 6. Itwillbe noted that they reels forthe centralQpair lof strips are alsosecured to x i 'i slides 177 as shown .in'Figure 6 vand these.;l r

vslides are secured in any desired transverse position by means of setrscrews 178. Inthis manner thel guide strips 166. can'. be bodilyadjusted tow'ard'oi from veach other to ac# commodate and provideachannel through which the'she'et material'v passes and. the` strips 166being present atalltimes to serve as guides during the cutting action.Ther pieces as they are cut from the corners of .the sheets will falldown ,throughthe lower l portions of thecutter. casings and ythrough the'space' 36 betweenthe separated parts of' each of the bed bars.

connection .ofthe reelswi'th the strips perf f a vmits the cuttercasings andcutters to, be movedtoward or from each other to cutvthe i..corners out of sheets of various lengths;` the `l e As a vmeans forconveying'these cuttings from the machine, I provide `conveyor belts`179.`at the lower portions offthe spacesf36;

said conveyor beltsfpassing over rpulleys `180 and 18,1, which arerespectively mounted on shaft-s 182 and183... The pulleys 181 areyslidably keyed to the shaft 183 and the shaft.

183 is driven by fabelt 184 whichpasses around a pulley 185 on saidshaft 183. The belt 184 is driven by a pulley 186 on the shaft 110 andit will -benotednthat 'the cut'- j -I tings which fall through thespaces 36, drop on the upper runs ofthe belts 179 andare conveyedrearwardly and deposited on a transversely extending vconveyor belt 187which is mounted belowv the conveyor beltsy 179. The conveyor belt 187passes around pulleys 188'and 189 which are respectively supported on?rods 190 and 191. A bevel gear 192 is secured to the shaft 191and thisbevel ygear 192 meshes lwith another bevel of the conveyor belt 187;said projecting' portion being illustrated in Figures 3, 7 and 8. Theshaft 125 which drives the conveyorfchain 122 forthe feeding carriage116, may be driven by any suitable mechanism and in the present instanceI have illustratedv the shaft 125 at a position out side ofthe Casing121 provided with a bevel gear 199 which mesheswith a bevel gear 200 ona shaft 201; 'said shaft within its length 'being provided with auniversal joint 202 asclcarly shown in Figure 6. The lower endbf theshaft 201 is provided with a bevel gea-r 203 which meshes with anotherbevel gear 204 on the shaft 66. Thus during the rotation of the saft 66the conveyor chain will be operated for the purpose above described. y

I provide the following mechanism for receiving the cut sheets. Thebottom of the main frame 20 has a rear extension 205 upon which isslida-ble transversely a bar 206. The bar 206is constructed similartothe 'bar 79 and has two sets of posts 207 which slidably supportkreceiving tables 208 and 209; either of the receiving tables 208 and209 being adapted t'obe moved into ,a position-centrally of the machineby pushing the bar 206 laterally. Considering that one ofthe tables 208and 209 is in a position,

locatedv centrally within the width of the machine` as clearly shown inFigure 2 rand in a. raised position with its top substantially on alevel rwith the tops of therails 73 and sheets which were previouslydeposited upon said receiving table. F or the above mentioned purpose lprovide the following mechanism.`

The tops ofthe posts 2.07 have an auxiliary frame 210vwhich slides onthe rear beam 22v as shown in\F igure 1 and this auxiliaryA :ffeI-e 210'has sprocket lwheels 1211 thereon?v l' over which chains 212 pass; saidchains at. one end being connected to the bottom pon tion of therespective tables whileV the opposite ends of the chains areprovided-*with weights 213; said weights serving tov A:move thereceiving tables upwardly when permitted to do so; it lbeing noted thatcertain of the sprockets 211 are provided witlr ratchet wheels 214 forthe engagement ywith pawls 215; said pawls serving when the tables aredepressed to prevent the tablesy from rising due to the action of theweightsl 213; said ratchet wheels and pawls beingA se 1 An arm 219 issecured to a shaft 220 in the frame extension illustrated in Figures 1and'2.

A presser foot 216 is mounted on a rodA 217 which is sldableverticallyi'n a rear Aextension 218 of the frame 20.

218 and the rear end of the arm 219 is connected to the top of the rod217 through the medium oit a link 221. The shaft 220- sheet on thereceiving table and' will 'cause` the entire stacl'of sheets to movedown-f wardlyv tomake room vat the top for thel neXt group of cutsheetsgthe pawls 215 serv-l ing to prevent upward movement ofthe rey yceiving table and'stacked sheets when the A presser foot is again raisedto its normall position. p

1t will be understood that each of the re'- ceiving tables is equippedwith'the mechanism just described in connection with the table 208 inits position as shown in Figures? 1 and 2 and it is therefore believedunnecessary' tovagain describe this detail of construction inlconnection with the table 209. 1n order to provide for the proper timingand dwell of the several parts so thatythey will operate in a mannerconsistent with that above described, l provide the shaft 110 with vacam 225 lwhich has ran internal cam groove 226 in which a projection 227on an arm 228 7 extends; said'arm 228 being pivoted at 229 on thelbracket 230 as clearly shown in Figure 9. The opposite end of thearm'228 is yoked to embrace the clutch collar 62;'said yclutch collarhaving'an annular groove-231 into which pins 232 in the yoked portion ofthe arm 228 project. Thus upon rotation of the cam 225 the clutch collar62 will be alternately movedV into and out of engagement with the clutchface 23 of the gear 64 and the cutting head will be'operatedy when theclutch collar is in operative connection with the gear 2 4.; thearrangement being such that I after they cut-ting head has descended andtomatically moved into' an inoperative po'- nagain risen that the clutchcollar willbe au sition as is obvious from the construction illustratedand above described.

By having the two tables 83 and 84 adjaf cent the feed end of themachine while one of the tables is in a position to permit the ieeoingof the sheets therefrom;` the other table can be stacked with blanksheets and when the table 83 as shown, in Figure 2 is empty the bar 79can be pushed so as to bring the filled table 8e into feeding alignment;it being noted that y'it is necessary to raise the connecting bars so asto disengage with the arms 97 for cnet-able and then connect the bars100 with the pins 98 for loperat-r ing the other table. rilhus it isalways possi ble to keep the tables 83 and 84 stacked with blank sheetsso that no time will be lost in the stoppingV of the machine.

In similar manner by having two receiving tables 208 and 209 when one ofthe tables becomes filled; the other table which has previously beenemptiedcan be pushed into receiving position merely by sliding the bar-206 transversely along the extension 205 of the base.

It is further obvious that'by the provision of the frame 9A, cross bars30 and bed bars 35,A the cutting elements can be moved into variouspositions to readily vaccommodate cardboard orvothersheet blanks ofvarious lengths and widths and for this reason my improved machine is ofparticularxadvantage in the art since it is capable of adjustment tosuit various requirements.

While I have described my invention as taking azparticular form; it willbe understood that the various parts oit' my invention may be changedwithout departing from the spirit thereof, and hence .l do not limitmyself to the precise construction set forth; but consider that Iam atliberty to make such changes and alterations as fairly come within thescope oit the appended claims.

Having thus described my invention, what l claim as new and desire tosecure by Letters Patent is 1 l. A machine of the character described.including a cutter casing having an opening providing Imouth extendingvlaterally therein; a cutter slidably mounted in said casing yand havinga cutting portieri movable across-said mouth; guidin means positionedwith its top surface approximately flushV with the .bottom portion ofsaidniouth; and means for feeding sheetinaterial along said guidingmeans and into said mouthwhereby the cutterA is operative to cut piecesout oit said sheet material. i

2. A machine of the character (lescribed including a main supptnrting`frame; .hed bars supported on said frame and adjustable transverse-lyot' the length thereof; a cutting head; cutters connected tosaid headand adjustablein the direction of the width and length ofsaid machine;cutter casings supported by said bed bars in .which the cutterslrespectively slide; means for feeding sheet including two sets oicutting units .spacedl apart; means for teeding'sheet material in pathbetween the sets of cutting units; guidmeans between the units 'et eachset; and means for reducing the length of said guid-r ing means when theunits of eachset are moved together;v and lor permitting the ilengthening oit said guiding` means when the units of each set areVmoved apart. i

JA machine of thecharacter described including two sets ot cutting units`spaced apart;`means for feeding sheet material in a path between thesets of cutting units; fienible guidingl strips between theunits ofeachSet; and means upon which said iiexible y guiding strips may be woundwhenthe units including two sets yot cutting units spaced apart; means`for feeding sheet -niaterialin a Y i` path between 'the sets of cuttingunits; tleXirble guiding strips between-the units of each set; meansuponvwhich said fleiiibleguiding Y strips may be wound when the unitsoit each set are `moved together and 'from which said lflexible stripscan be uiiwound when thecutting units are vmoved. apart; and means forpermittingi the adjustment ot said strips to-y ward or from each otherto vary` the width ot the path through which said sheetmaterial canpass. i

6. A machine oit the 4cliaracter described including `uiting,uigiitsspaced apart; a fienible guiding strip extending between ysaid cuttingunits; and a reel upon which said including cutting units spaced apart;a tieni l ble guiding stri) extending between said n i c i t?" t cuttingunits; a reelupon which said strip can be wound .when the cutting unitsare moved toward each other and from which the strip can be=unwouniflwhen the cutting units moved apart;v and vmeans forv preventingaccidental unwinding movement oit said reel.

8. A .machine oi the chaiucte described including cutting units spacedaiiiui't; a iiexible guiding vstrip extending between said cuttingunits; a reel upon which said strip I j iy can be `wound ywhen thecutting units are Cli moved toward each other and 'from which the stripcan be unwound when the cutting units are moved apart; and means Ytoi'automatically. rotating said rcel when the cutting units are movedtogether vwhereby the length oi said strip is shortened.

9. A machine ot the character described including cutting units spacedapart; a tierible guiding` strip extending between said cutting' units;a reel upon which saidstrip can be wound when the cutting units aremoved toward each other and vtrom which t-he strip can be unwound whenthe cutting unitsare moved apart; and a spring connected to said reeland operative to wind a portion ot said strip thereon when the units aremoved together; said spring being pla cedunder tension by the rotationot said reel when the units are moved apart; substantially as described.

V10. A machine ot the character described including a cutter casinghaving an opening` providing a mouth extending laterally therein; acutter slidably mounted in said casing and havinga cutting portionmovable across said mouth; guiding means positioned with its top surfaceapproximately flush withr the bottom portion of said mouth; means torfeeding sheet material along said guiding means and into said mouthwhereby the cutter is operative to cut pieces out et said `sheetmaterial; and a bed bar having portions spaced apart under said cuttercasing.

1l. A machine ot the character described including a' main supportingiframe; Vtwo bed bars extending longitudinally of said trame and beingmovable transversely therein gcutter casings supported by said bed barsand movable longitudinally thereof; mechanical means tor moving said bedbars transversely toward and from each other whereby said cutter casingsreceive said movement; cutters ifitting said casings; a superimposedcutting head having a'trame 'forming a common connecting means for saidcutters; means tor connecting said cutters with the cutting` headwhereby the cutters are capable ot adjustment in conjunction with saidcasings and bed barsgmeans for actuating said cuttinghead to move thecutters within'the casings; and means for feeding sheet material betweenthe cutters and casings.`

l2. A machine of the character described including a main supportingtrame; two bed bars extending longitudinally ot said frame and beingmovable transversely therein; cutter casing supported by said bed barsand movable longitudinally thereof; mechanical means for moving said bedbars transversely toward and from each othei1 whereby said cuttercasings receive said movement; cutters iitting said casings; asuperimposed cutting head having a trame `forming a com# .mon connectingmeans for said cutters;

1,41 cesa means tor connecting said cutters with the cutting headwhereby the cutters are capable et' adjustment in conjunction withsaidcascutting head to move the cutters within the casings; and meansfor feeding sheet material between the cutters Aand casings.

i3. A machine ot the character described including` vcutter casingshaving openings providing mouths extending laterally there'- in; cuttersslidably mounted in said casings and having blades j movable across saidmouths; guiding rails positioned with their top surtaces substantiallyflush with the bot-I tom portions ot said mouths; and means 'tor ieedingsheet material along said guiding rails and into said mouths whereby thecutters are operative to cut pieces out ot said sheet material.

14;. A machine of the character described including cutter casingshaving openings providing mouths extending' laterally thereings and bedbars; means ttor actuating'said top surfaces substantially flush withvthe bottom portions ot saidmouths -means tor eedf ing sheet materialalong said guiding rails and into said mouths whereby the cutters areoperative to cut pieces out ot said sheet material; and a. bed'barhaving portions spaced apart under said cutter casing.

15r A machine of the character described including` a supportingstructure; a recipro'- eating cutter movable relatively to saidsupmaterial into the path of cutting movement ot said cutter; a huntingstop 'for said sheet 100. porting structure; means tor eedingsheetmaterial; and means movable by said sheet material toy effect themovement ot said limit` ing stop intoa position to prevent the inertiaot said sheet material tromcarrying it past a predetermined positionrelatively to thev cutter.

porting structure/g means tor feeding sheet material into the pat-li oilcutting'movement of said cutter; a limiting stop for said sheetmaterial; means movable by said sheet material to effect the movement ofthe limiting stop into a position to prevent the inertiaof said sheetmaterial from carr in -it laast a predetermined position relatively tothe cutter; and means movable in conjunction with said cutter adapted toreturn said limiting' stop to its inoperative position. j

17. A. machine ot the character described including a. supportingstructure; av recipro' eating cutter movablev relatively to saidsupporting structure; means for feeding sheet material into the path ofcutting movement f ot said cutter; a limiting stop for saidsheetmaterial having a notch therein' ga bolt mov-I able into said notch; atrip lever adapted to be moved by said sheet material fand operative toWithdraw the bolt from said 'notch in the limiting stop; and means forautomatically moving said -limitingstop When thus released into aposition to stop the movement of said'sheetmaterial in apredeterminedposition relatively to the cutter.

18. A'Imachine of the character described including a supportingstructure; a reciprocating cutter movable relatively to ksaid supportingstructure; meansl for feeding sheet f material into the path ofcuttingmovement of said cutter.; a limiting stop for said sheetmaterial; and` means movable by said' sheet material to effect themovement of said limitingl stopinto a position to prevent the inertia ofsaidslieet material from carrying it past a predeterminedposition/relatively to the cutter, said cutter and limiting'stop be.-ing adjustable in conjunction with each othei-.relatively tothe lengthof said supporting structure. 1

19. A machine of the character described including a supportingstructure; a reciprocating cutter movable relatively to said supportingstructure; means for feedingsheet material into the path of cuttingmovement of said cutter; a limiting stop for said sheet materialyandmeans `movable bysaid sheet material to effect the movementyof vsaidlimiting stop into a position to prevent the inertia of saidl sheetmaterial from carrying it past a predeterminedy position relatively tothe cutter, said cutter and limiting' stop being adjustableindependently' of each other relativelyv to the 4length of the supyporting structure.

l 20. A machine of the character described including a supportingstructure; a cutter casing' adjustable in the direction of the length ofsaid supporting structure; a cutter movably mounted in said casing; aplate adjustably mounted on said cutter casing; means for feeding sheetmaterial lengthwise of the supporting structure into the path of thecutter; a limiting stop movably mounted on said plate and having a notchtherein; a lock bolt on said plate; a spring for moving said lock boltinto engagement with the notch of the limiting stop; ya trip. lever fadapted. to be moved by said sheet material to move said lock bolt outofsaid notch; and a spring for moving said limiting stop into a positionto arrest the movement of said sheet material in a predetermined posi-`tion relatively to said cutter.

2l. A machine of the character described including a supportingstructure; a cutter casing adjustable in the direction' of the length ofsaid supporting structure; a cutter movably mounted in said casing; aplate adjustably mounted `on said cutter casing; means for feeding sheetmaterial lengthwise of the supporting structure into the pathof thecutter; a limiting stopmovably mounted onk said -plate and having anotchgthereinga" adapted to be moved by saidsheetmaterial to-move saidlockboltgout lof said notch; and

a position to arrest the movement of said sheet material in `a'predetermined position ya spring formovingl said'limiting'stop 'intorelatively to -said cutter, saidlock bolt-.hav--l g ing a shoulder Withwhich said trip lever engages; a spring fory .returning said trip leverto its normal position, said trip lever having ay pivoted en dindependently movablefthereon to permit it to move into engagement Withsaid shoulder lduring the return movement of the trip lever. 'i a 22. Amachine of the character described including a vmainx supporting frame;.bed bars supported on said vframe and adjustable transversely ofkthelength thereof; a cutting head; cuttersconnectedv to vsaid head andadjustable in the directiony of the 4Width and length of saidmachine;cutter casings supported by said'bedbars iii-Which the cuttersrespectivelyfslide, 'said cutter casings having open bottoms and `sideopenings above said bottoms; means for feeding sheet material so thatvparts IthereOfIWill passy intojsaid side openings; yand means.formoving said cutting head, said bed bars having portions spaced apartbelow saidbottoms of thecut# ter casings to provide a space throughwhich ioo,

the cuttings'fall." .v I-23. machine of the character'describedincluding -tWo bed1bars; means operative .to

or from each other; cutting `units supported on said bed bars; commonV`means' for movmovable therein, lsaid casings having op posedy openingsproviding mouths through so s simultaneously move said bed ybars towardj which f said cutters pass; supporting rails` having portions adjacentthelovver parts of' said mouths; and meansyfor feeding-sheet.l

material along said railsand through said mouths of the casings. l

' 24. A machine of the character described including bed bars; means formoving said bed bars toward and from each other and including screwthreaded shafts having certain portions of their threads pitched atopposite vangles and engaging their screvv threaded portions on the bedbars; cutting units slidably mounted on said bed bars; and means ormoving saidcutting units on said bed bars in a directiontransversely tosaid movement of thebed bars; and conveyer belts movable in conjunctionWith said I bedbars and adapted to receive cuttings from said cuttingunits as material "is fed thereto.' l Y

